I do recall, not sure if it was bca or napa, the crowd of one or two was getting into it, I was practicing super thin cuts into side pocket, fell'er came up to the table and said, 'son!, ya no u can't be practa-sin. happen to be my next whoop'n.
Having never been there - handling the logistics of a tournament, putting everything a side, if there's 20 minutes between the end and start of a match I'd set up a 15 ball rack of 3 colors with the objective being the next contenders are ready, in place - in 5 minutes the snap of whip, they get 2 lags, best results break, each player shoots till they make one ball of each color, +1 for each, -1 for each miss, once the three are made the contender gets their chance, play till all balls gone - in 15 minutes or less.
...oh, look for me Dan_B on the side, I'd be taking bets on who wins the lag, points, misses, last potted colour and overall winner. Winner gets the break on the upcoming match,
shouldn't be any problem...